I'm still waiting for AIDS to significantly affect the population of a country.
Yes, perhaps you've read this work by one of the original AIDS researchers.
THE AFRICAN AIDS EPIDEMIC: NEW AND CONTAGIOUS - OR - OLD UNDER A NEW NAME?
It contrasts the exponential growth, then leveling off and precipitous decline, of the mortality rate of a truly microbial disease, with the slow and even, long term death rate of a behavioral or chemical caused event, highlighting that AIDS follows the later course, not the former.
Based on this work, I am no longer convinced that HIV is the killer it is thought to be. You're quite right that no country has seen these enormous deaths, plus what is attributed to death by "AIDS" every year in Africa includes more and more different diseases, all under the assumption that they are secondary to HIV infection, when in fact they are independent causes of death in and of themselves.
I just tossed the HIV point in because it's not been shown it's harmless at all either. Plus many Muslim families are electing to do a suicide bombing to erase the "shame" of an HIV infection, whether or not it's a killer disease, this could affect a lot in coming years.